CN211707373U

CN211707373U - Mechanical rocker arm type amplitude-amplifying electromagnetic flip-flow screen

Info

Publication number: CN211707373U
Application number: CN201922058278.5U
Authority: CN
Inventors: 王新文; 吴世民; 庞锟锋; 王喆; 苏醒; 陈宝兴; 徐宁宁
Original assignee: China University of Mining and Technology Beijing CUMTB
Current assignee: China University of Mining and Technology Beijing CUMTB
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-10-20
Anticipated expiration: 2029-11-26

Abstract

The utility model discloses an amplitude electromagnetism flip-flow screen is enlargied to machinery rocking arm formula has solved the not enough problem of current electromagnetism vibration flip-flow screen amplitude. The electromagnetic vibration relaxation sieve comprises: the device comprises a main screen frame, a floating screen frame, a mechanical amplification rocker arm, an electromagnetic vibration exciter, a rubber block, a shearing spring and a supporting device. The utility model discloses a reform transform traditional electromagnetic vibration relaxation sieve, both ends electromagnetic vibration exciter is interrupted the circular telegram, attracts repeatedly the armature of welding at the mechanical rocking arm short arm to drive the unsteady reel motion of transmission shaft and the long arm drive of mechanical rocking arm, utilize electromechanical resonance principle to make the reciprocating vibration of relaxation sieve. The utility model has the advantages of the amplitude is big, screening efficiency is high, has certain guiding significance to the high-efficient screening of electromagnetic vibration relaxation sieve.

Description

Mechanical rocker arm type amplitude-amplifying electromagnetic flip-flow screen

Technical Field

The utility model belongs to screening machinery provides a mechanical equipment of screening that big amplitude can be frequently particularly.

Background

Amplitude is a major factor affecting the screening efficiency of a flip-flow screen. The size of the gap between the electromagnetic vibration exciter and the armature iron determines the amplitude of the electromagnetic relaxation screen. Since the electromagnetic force is inversely proportional to the square of the gap size; approximately proportional to the square of the current, but when the current is too large, the electromagnet will gradually reach a magnetic saturation state, and the increase of the electromagnetic force will slow down. At present, the sieve plate of the traditional electromagnetic relaxation sieve is directly connected with an armature, in order to ensure enough exciting force, the gap between an electromagnetic vibration exciter and the armature is small, the stroke of a sieve frame is limited, enough amplitude cannot be provided, and the sieving effect is poor.

The traditional electromagnetic relaxation sieve cannot provide enough amplitude due to design reasons, so that the sieving effect is poor. On the basis, the utility model is additionally provided with a link mechanism between the excitation source and the sieve plate, which is equivalent to a lever. Because the excitation force is approximately inversely proportional to the square of the gap, and the amplitude of the sieve plate is directly proportional to the force-arm ratio (the ratio of the long arm to the short arm of the rocker arm), after the rocker arm mechanism is added to the electromagnetic relaxation sieve, the gap between the electromagnetic vibration exciter and the armature is reduced, the excitation force is increased, and the excitation amplitude is amplified.

Disclosure of Invention

The utility model aims at providing a novel screening equipment has solved the not enough problem of electromagnetism flip-flow screen amplitude among the prior art, provides a higher amplitude electromagnetism flip-flow screen is enlargied to mechanical rocking arm formula of screening efficiency through lever principle.

In order to solve the above problem, the utility model discloses an adopt following technical scheme to realize: a mechanical rocker arm type amplitude-amplifying electromagnetic flip-flow screen comprises a main screen frame, a floating screen frame, a mechanical amplifying rocker arm, an electromagnetic vibration exciter, a rubber block, a shearing spring and a supporting device. The electromagnetic vibration exciter is characterized in that the electromagnetic vibration exciter is fixed on the outer side of a screen frame, one end of a short arm of a mechanical amplification rocker arm is connected with an armature close to the electromagnetic vibration exciter, and the other end of the short arm of the mechanical amplification rocker arm is connected with a transmission shaft; one end of the long arm of the mechanical amplification rocker arm is connected with the transmission shaft, and the other end of the long arm of the mechanical amplification rocker arm is connected with the floating screen frame. The floating beam penetrates through the active frame to be connected with the channel steel, and the rubber block is clamped between the angle steel and the channel steel, so that the floating frame is supported. The electromagnetic vibration exciter attracts the armature to push the floating screen frame through the amplitude amplification of the mechanical amplification rocker arm.

The utility model discloses a theory of operation: the electromagnetic vibration exciter fixes the outer side of the screen frame, and one end of the short arm of the mechanical amplification rocker arm is connected with the armature close to the electromagnetic vibration exciter, so that the gap is small, and a large exciting force is provided. The mechanical amplification rocker arm is pushed to swing, so that the floating screen frame is pushed to reciprocate. Larger amplitudes can be obtained by mechanically amplifying the rocker arm.

The beneficial effects of the utility model reside in that: the amplitude is big, and simple structure has overcome the not enough shortcoming of traditional frequency conversion electromagnetism relaxation sieve amplitude.

Description of the drawings:

FIG. 1 is a schematic structural view of a large-amplitude electromagnetic flip-flow screen of the present invention;

FIG. 2 is a schematic structural view of the main frame of the present invention;

FIG. 3 is a schematic view of the floating frame and the driving structure of the present invention;

fig. 4 is a middle sectional view of the present invention;

symbolic illustration of the main parts in the figures: 1-a main screen frame; 2-floating the screen frame; 3-mechanical rocker arm short arm; 4-a transmission shaft; 5-mechanical rocker arm long arm; 6-an electromagnetic vibration exciter; 7-a shear spring; 8-floating screen frame reinforcing plates; 9-main screen frame screen beam; 10-floating screen frame and screen beam.

The specific implementation mode is as follows:

the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, 2, 3 and 4, the utility model discloses a mechanical rocker arm type amplitude amplifying electromagnetic flip-flow screen.

As shown in fig. 1, the main structure of the mechanical rocker arm type amplitude-amplifying electromagnetic flip-flow screen comprises a main screen frame 1, a floating screen frame 2, a mechanical rocker arm short arm 3, a transmission shaft 4, a mechanical rocker arm long arm 5, an electromagnetic vibration exciter 6 and a shearing spring 7.

As shown in fig. 2 and 3, the active screen frame and the floating screen frame of the mechanical rocker type amplitude-amplifying electromagnetic relaxation screen and the electromagnetic drive are provided. The electromagnetic vibration exciter 6 is fixed on the outer side of the side plate of the driving screen frame through four bolts, the short arm 3 of the mechanical rocker arm is connected with the armature close to the electromagnetic vibration exciter 6, and the long arm 5 of the mechanical rocker arm at the other end is connected with the reinforcing plate 8 of the screen frame. The long arm and the short arm are connected by a transmission shaft 4. The transmission shaft 4 penetrates through the driving screen frame.

As shown in fig. 4, the main screen frame screen beams 9 and the floating screen frame screen beams 10 are alternately arranged, one section of the flexible screen plate is fixed on the main screen frame screen beams, and the other end of the flexible screen plate is fixed on the floating screen frame screen beams. The pan feeding end of the sieve beam of the floating sieve frame is connected with a reinforcing plate, and the other end of the reinforcing plate is connected with a mechanical rocker arm long arm.

The utility model discloses a working process realizes like this: the electromagnetic vibration exciter is connected with the side plate of the driving frame through a bolt, and then a certain gap is reserved between the electromagnetic vibration exciter and the short arm armature of the mechanical rocker arm so as to provide larger electromagnetic force and attract the short arm of the mechanical rocker arm to swing around the transmission shaft, and the power pushes the floating screen frame to do large-amplitude reciprocating motion through the transmission shaft and the long arm of the mechanical rocker arm.

Claims

1. A mechanical rocker type amplitude-amplifying electromagnetic flip-flow screen comprises: the screen frame comprises a main screen frame (1), a floating screen frame (2), a mechanical rocker arm short arm (3), a transmission shaft (4), a mechanical rocker arm long arm (5) and an electromagnetic vibration exciter (6), and is characterized in that the electromagnetic vibration exciter (6) is fixed on the outer side of the screen frame, one end of the mechanical rocker arm short arm (3) is connected with an armature close to the electromagnetic vibration exciter, and the other end of the mechanical rocker arm short arm (3) is connected with the transmission shaft (4; one end of a mechanical rocker arm long arm (5) is connected with the transmission shaft, the other end of the mechanical rocker arm long arm is connected with the floating sieve frame (2), and the electromagnetic vibration exciter (6) attracts the armature to push the floating sieve frame (2) to do reciprocating motion by amplifying amplitude of the mechanical rocker arm.

2. The mechanical rocker-arm type amplitude amplifying electromagnetic flip-flow screen as claimed in claim 1, wherein: the two electromagnetic vibration exciters (6) are fixed to the outer side of the side plate of the main screen frame (1) through bolts and drive the mechanical rocker arm mechanism.

3. The mechanical rocker-arm type amplitude amplifying electromagnetic flip-flow screen as claimed in claim 1, wherein: the driving force attracts the short arm of the mechanical rocker arm to swing around the transmission shaft, and the power pushes the floating screen frame to do large-amplitude reciprocating motion through the transmission shaft and the long arm of the mechanical rocker arm.